2021803783378 has 32 divisors (see below), whose sum is σ = 3113361077760. Its totient is φ = 984248038080.

The previous prime is 2021803783319. The next prime is 2021803783399. The reversal of 2021803783378 is 8733873081202.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26072323 + ... + 26149753.

It is an arithmetic number, because the mean of its divisors is an integer number (97292533680).

Almost surely, 2^{2021803783378} is an apocalyptic number.

2021803783378 is a deficient number, since it is larger than the sum of its proper divisors (1091557294382).

2021803783378 is a wasteful number, since it uses less digits than its factorization.

2021803783378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78922.

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 2021803783378 in words is "two trillion, twenty-one billion, eight hundred three million, seven hundred eighty-three thousand, three hundred seventy-eight".